Rat tail suspension device

The utility model discloses a rat tail suspension device which comprises a sleeve, a built-in air bag, an inflation ball and a sleeve bottom opening arranged at the lower end of the sleeve. The rolling opening of the bottom opening of the sleeve is formed in the outer edge of the bottom opening of the sleeve; the sleeve top opening is formed in the upper end of the sleeve; the hanging ring is mounted on the outer side of the upper end of the sleeve; the ventilation pipe opening is formed in the outer side of the middle section of the sleeve; the ventilation pipe is arranged on the outer side of the ventilation pipe opening; the breather pipe valve is mounted at the middle section of the breather pipe; the breather pipe valve groove is formed in the breather pipe; the built-in air bag is arranged in the sleeve and is communicated with the vent pipe opening; the air inflation ball is connected with the air inflation guide pipe; and an air return valve is arranged at the lower end of the inflatable ball. Accordi